Arsenite oxidizing bacterium isolated from high arsenic contaminated groundwater aquifers from Datong Basin, Northern China

摘要

A microbial strain (Datong-1) was isolated from high arsenic containing aquifer sediments from Datong Basin. The strain Datong-1 was identified as an Arthrobacter sp. based on 16S rDNA phylogenetic relationships and most closely related to DQ320481.1 and EU 196326.1 within the Arthrobacter genus. The batch experiments indicate that strain Datong-1 can rapidly oxidize As(III) to As(V) during the exponential growth and the oxidizing rate decreased significantly at stationary growth stage. Cell growth was concurrent with the variation of concentrations of As(V) and As(III) therefore declined clearly as a result of microbial activity. Therefore, Datong-1 has potential for cleaning-up of arsenic contaminated groundwater at Datong in the future.